your going to get a lot of pro Garret/Borg warner etc etc but i have first hand have 3 of these so call cheap turbos, and my friend has 1 .
i had a cheap gt28 turbo on my mps 2.3 turbo cost 139 from maxspeeding rods 2 years ago and its now done 14k at 20psi boost and get used hard.
my old cossie which had a gt30 type non roller bearing turbo from maxspeeding rods has done at least 9000 miles on and running 25psi is still going strong as my friend has it. and my current cossie has a t35 type one again from maxspeedingrods and has done 3k so far at 26psi. i also have a gt30 type one on my mk2 cossie engine but its only done mapping mileage so not really tested.

ive yet to blow one or have oil seals go and to be fair you goto all the jap boys they swear by them also.